q 15 / 2 − 4 q 13 / 2 + 10 q 11 / 2 − 15 q 9 / 2 + 20 q 7 / 2 − 23 q 5 / 2 + 22 q 3 / 2 − 20 q + 13 q − 8 q 3 / 2 + 3 q 5 / 2 − 1 q 7 / 2 {\displaystyle q^{15/2}-4q^{13/2}+10q^{11/2}-15q^{9/2}+20q^{7/2}-23q^{5/2}+22q^{3/2}-20{\sqrt {q}}+{\frac {13}{\sqrt {q}}}-{\frac {8}{q^{3/2}}}+{\frac {3}{q^{5/2}}}-{\frac {1}{q^{7/2}}}}
